Discard SampledEffects on elements if they are redundant

third_party/WebKit/Source/core/animation/InvalidatableInterpolation.h

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef InvalidatableInterpolation_h
 #define InvalidatableInterpolation_h
 
 #include "core/animation/InterpolationType.h"
 #include "core/animation/PrimitiveInterpolation.h"
 #include "core/animation/PropertyInterpolationTypesMapping.h"
@@ skipping 10 matching lines @@
         PropertyHandle property,
         const InterpolationTypes& interpolationTypes,
         PassRefPtr<PropertySpecificKeyframe> startKeyframe,
         PassRefPtr<PropertySpecificKeyframe> endKeyframe)
     {
         return adoptRef(new InvalidatableInterpolation(property, interpolationTypes, startKeyframe, endKeyframe));
     }
 
     PropertyHandle property() const final { return m_property; }
     virtual void interpolate(int iteration, double fraction);
-    bool dependsOnUnderlyingValue() const;
+    bool dependsOnUnderlyingValue() const final;
     virtual void apply(InterpolationEnvironment&) const { ASSERT_NOT_REACHED(); }
     static void applyStack(const ActiveInterpolations&, InterpolationEnvironment&);
 
     virtual bool isInvalidatableInterpolation() const { return true; }
 
 private:
     InvalidatableInterpolation(
         PropertyHandle property,
         const InterpolationTypes& interpolationTypes,
         PassRefPtr<PropertySpecificKeyframe> startKeyframe,
@@ skipping 29 matching lines @@
     mutable OwnPtr<PrimitiveInterpolation> m_cachedPairConversion;
     mutable ConversionCheckers m_conversionCheckers;
     mutable OwnPtr<TypedInterpolationValue> m_cachedValue;
 };
 
 DEFINE_TYPE_CASTS(InvalidatableInterpolation, Interpolation, value, value->isInvalidatableInterpolation(), value.isInvalidatableInterpolation());
 
 } // namespace blink
 
 #endif // InvalidatableInterpolation_h